A Breeding Method of P Group Maize Inbred Line lx286

Abstract

The invention relates to a method for breeding a P-group corn inbred line Lx286. The S 0 generation; in Hainan to S 0 S 1 At the same time, use the test species C138 and its S 0 Generation combination to obtain combination C138 / S 0 ; According to the hybrid combination C138 / S 0 Yield and field performance (lodging resistance, disease resistance) in Jinan, it is considered that the offspring of Y928 / C486 established as the basic population are suitable for line selection; the S of Y928 / C486 was planted in Zhangye, Gansu 1 Progeny group, select early-maturing S with excellent comprehensive traits 2 single plant; in Hainan, S 2 A single plant was planted into panicle rows, and the test species C138 was used to measure and match these panicle rows, and S 3 Spike row; in Jinan, the S of the spike row will be selected 3 S 4 , according to the field performance and yield measurement results of the test-matching combination, and S 3 According to the comprehensive performance of Suixing, the S with higher combining ability was selected. 4 ;Continue to bagging self-breeding in Hainan and Jinan, and according to the test results of different test species, finally select the maize inbred line Lx286.

Description

technical field [0001] The invention belongs to the field of agricultural science and technology, and in particular relates to a method for breeding a P group maize inbred line Lx286. Background technique [0002] Breeding is a very cyclical work. It usually takes 10-15 years to breed a variety, and most of the breeding time is spent on line selection. The breeding process is actually the process of line selection. Line selection is An important part of maize breeding. The purpose of line selection is to achieve continuous recombination and aggregation of excellent genes to create new inbred lines. With excellent inbred lines, excellent hybrids will definitely be produced. [0003] In order to ensure the success rate of breeding inbred lines, methods such as large populations, high-density screening, and early generation combining ability tests are generally used. Lines become possible, so that the breeding cycle can be shortened to 2 years. However, we only focused on t...

AI Technical Summary

Problems solved by technology

However, we only focused on the advancement of technological means, and did not realize from the beginning whether the combined corn basic material is suitable for selection, that is, whether the offspring of this group have high combining ability. If the offspring group does not have good combining ability, All our technical means don't work

At the same time, we did not pay attention to whether the inbred lines we bred have high combining ability, but whether they can meet the needs of Northwest seed production, especially the P group inbred lines with tropical blood are sensitive to light and temperature, and the flowering period is late , the flowering interval of the parents is long, and there is a greater risk in seed production